作　　者： ; ; ; ; ;

机构地区： 河南科技大学规划与建筑工程学院

出　　处： 《河南科技大学学报（自然科学版）》 2012年第2期38-42,6-7,共5页

摘　　要： 通过室内模型试验,从洞室破坏形态、自由场应力、洞壁应变、拱顶和底板位移、洞室围岩加速度5个方面,对不同锚杆支护形式洞室在平面装药条件下破坏情况和受力变形特点进行了研究。试验结果表明:在平面装药条件下,洞室破坏主要发生在拱顶及拱角附近,全长黏结式锚杆带筋板支护形式能明显减小拱顶拉应变、拱腰压应变和边墙竖向应变。弹力式锚杆带筋板支护形式能明显减小拱顶拉应变和边墙竖向应变,但会增大拱脚环向压应变;两种支护形式对边墙底部应变影响不明显。总体来看,全长黏结式锚杆加固效果较弹力式锚杆好。试验结果对锚固洞室抗爆设计具有重要参考价值。 In the indoor model test,the forms of failure and the stress-strain charasteristic of the cavern under plane charge with different blot support forms were studied from five aspects as the failure pattern of cavern,the free-field stress,catity wall strain,displacement at vault and floor,and surrounding rock accelation.The results reveals that cavity damage occurs mainly near the vault and skewback.The support form of full resin blot sheet with ribs can dramaticly reduce vault tension,hance compression and longitudinal strain in sild wall.The spring type sheet with ribs can obviously decrease strain in vault and sild wall,but the circumferential strain will increase.Both forms have little influence on sild wall strain at the bottom.Overall,the first form is better then the second.The result from this test has important value in anti-explosion design for reforced cavern.

关 键 词： 锚固洞室 平面装药 加固效果 模型试验

领　　域： [矿业工程]